18 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_FLUSH_EARLY_CONTENT_WRITER_FILTER_H_
19 #define NET_INSTAWEB_REWRITER_PUBLIC_FLUSH_EARLY_CONTENT_WRITER_FILTER_H_
23 #include "net/instaweb/http/public/logging_proto.h"
24 #include "net/instaweb/http/public/logging_proto_impl.h"
25 #include "pagespeed/kernel/base/basictypes.h"
26 #include "pagespeed/kernel/base/null_writer.h"
27 #include "pagespeed/kernel/base/scoped_ptr.h"
28 #include "pagespeed/kernel/base/string.h"
29 #include "pagespeed/kernel/base/string_util.h"
30 #include "pagespeed/kernel/base/writer.h"
31 #include "pagespeed/kernel/html/html_element.h"
32 #include "pagespeed/kernel/html/html_node.h"
33 #include "pagespeed/kernel/html/html_writer_filter.h"
34 #include "pagespeed/kernel/http/semantic_type.h"
35 #include "pagespeed/kernel/http/user_agent_matcher.h"
37 namespace net_instaweb {
51 static const char kDisableLinkTag[];
52 static const char kPrefetchImageTagHtml[];
53 static const char kPrefetchStartTimeScript[];
54 static const char kNumResourcesFlushedEarly[];
55 static const char kLinkRelPrefetchTagHtml[];
56 static const char kPrefetchScriptTagHtml[];
57 static const char kPrefetchLinkTagHtml[];
58 static const char kFlushEarlyStyleTemplate[];
62 virtual void StartDocument();
63 virtual void EndDocument();
65 virtual void StartElement(HtmlElement* element);
66 virtual void EndElement(HtmlElement* element);
68 virtual void Characters(HtmlCharactersNode* characters_node);
69 virtual bool CanInjectScript()
const {
return true; }
76 void WriteToOriginalWriter(
const GoogleString& in);
79 bool IsFlushable(
const GoogleUrl& gurl,
80 const FlushEarlyResourceInfo::ResourceType& resource_type);
83 void FlushResourceAsImage(StringPiece url);
85 void FlushResourceWithHtmlTemplate(
const char* templ, StringPiece url);
90 int64 time_to_download,
91 bool is_pagespeed_resource,
92 semantic_type::Category category);
94 void FlushDeferJavascriptEarly();
95 void UpdateStats(int64 time_to_download,
bool is_pagespeed_resource);
96 GoogleString ComputeFlushEarlyCriticalCss(
const GoogleString& style_id);
99 FlushEarlyResourceInfo::ResourceType GetResourceType(
100 const GoogleUrl& gurl,
bool is_pagespeed_resource);
103 TimedVariable* num_resources_flushed_early_;
106 bool insert_close_script_;
107 int num_resources_flushed_;
108 NullWriter null_writer_;
109 Writer* original_writer_;
110 HtmlElement* current_element_;
111 UserAgentMatcher::PrefetchMechanism prefetch_mechanism_;
112 scoped_ptr<StringSet> private_cacheable_resources_;
113 scoped_ptr<StringSet> public_cacheable_resources_;
114 int64 time_consumed_ms_;
115 int64 max_available_time_ms_;
116 typedef std::list<ResourceInfo*> ResourceInfoList;
117 ResourceInfoList js_resources_info_;
118 bool defer_javascript_enabled_;
119 bool is_flushing_critical_style_element_;
120 GoogleString css_output_content_;
121 GoogleString flush_early_content_;
122 bool flush_more_resources_early_if_time_permits_;
123 bool stylesheets_flushed_;
Definition: rewrite_driver.h:98
Definition: flush_early_content_writer_filter.h:49